#include<bits/stdc++.h>
namespace {
#pragma GCC diagnostic ignored "-Wunused-function"
#include<atcoder/all>
#pragma GCC diagnostic warning "-Wunused-function"
using namespace std;
using namespace atcoder;
#define rep(i,n) for(int i = 0; i < (int)(n); i++)
#define rrep(i,n) for(int i = (int)(n) - 1; i >= 0; i--)
#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)
template<class T> bool chmax(T& a, const T& b) { if (a < b) { a = b; return true; } else return false; }
template<class T> bool chmin(T& a, const T& b) { if (b < a) { a = b; return true; } else return false; }
using ll = long long;
using P = pair<int,int>;
using VI = vector<int>;
using VVI = vector<VI>;
using VL = vector<ll>;
using VVL = vector<VL>;

} int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int n;
  cin >> n;
  VVI to(n);
  rep(u, n) {
    rep(_, 4) {
      string s;
      cin >> s;
      if (s == "H") continue;
      int v = stoi(s) - 1;
      to[u].emplace_back(v);
    }
  }
  string ans;
  auto dfs = [&](auto&& self, int u, int p) -> void {
    for (int v : to[u]) if (v != p) {
      ans += '(';
      self(self, v, u);
      rep(_, 3) ans.pop_back();
      ans += "yl)";
    }
    ans += "methane";
  };
  dfs(dfs, 0, -1);
  cout << ans << '\n';
}